World number one sang 'Shake it Off' by Taylor Swift at karaoke ahead of grass court tournament.

Women's tennis world number one Serena Williams has been seen singing karaoke with friends in London ahead of Wimbledon. The 21-time Grand Slam winner is in the UK capital ahead of the grass court Grand Slam, which starts on 27 June.

Williams sang songs including; "What a Feeling" by Flashdance and "Shake it Off" by Taylor Swift as she took an evening off preparing for the tournament. The US star also revealed she was a big karaoke fan.

"I do karaoke all the time. I was actually on Snapchat one day and I saw Venus (Williams) at a karaoke bar and I was at a different one! So it's funny".